<!DOCTYPE html>
<html>
 <head>
  <meta charset="utf-8">
  <title>用户登录界面</title>
  
  <!-- 引入外部的CSS样式 -->
  <link rel="stylesheet" href="css/style.css"/>

 </head>
 <body>
  <table>
   <tr>
    <th colspan="2">用户登录</th>
   </tr>
   <tr>
    <td>用户名：</td>
    <td><input type="text" id="user" /></td>
   </tr>
   <tr>
    <td>密码：</td>
    <td><input type="password" id="pass" /></td>
   </tr>
   <tr>
    <td colspan="2"><input type="button" class="button"/></td>
   </tr>
  </table>

 </body>
</html>